A wire saw cutting knife

Abstract

The present invention relates to a wire saw cutting knife, which comprises a knife bar and a knife handle, wherein the knife bar is connected to the knife handle, and at least two cutting blades are arranged on the knife bar, and at least two of the cutting blades are spirally coiled from the first end to the second end of the outer peripheral wall of the knife bar and are arranged at intervals, and a plurality of knife teeth are arranged at intervals on each cutting blade, and the projections of the plurality of knife teeth on a plane perpendicular to the knife bar are connected in sequence along the circumference of the knife bar, so that the arrangement of the cutting blades can ensure that the cutting knife cuts more smoothly within a cutting stroke; the design that the projections of the plurality of knife teeth on a plane perpendicular to the knife bar are connected in sequence along the circumference of the knife bar can ensure that no matter which angle the cutting knife is changed to for cutting, there will be a corresponding connection between the knife teeth and the cutting material within the same cutting stroke, and the cutting effect is ensured while taking into account the flexible steering.

Description

Technical Field

[0001] The invention relates to the field of cutting tools, in particular to a wire saw cutting tool. Background Art

[0002] There are many types of tools that can be used for wood cutting, such as chain saws, band saws, circular saws and jigsaws. Among them, jigsaws are widely used for household wood cutting because of their small size, low noise and portability. Most existing jigsaw tools are slender and thin straight blades. When cutting the surface of the material, they mostly cut along a straight line or a smooth curve. When the required cut is a complex curve or even an irregular shape, the saw blade position angle needs to be adjusted multiple times during the processing, which not only increases the workload and labor intensity, but also easily causes the cut surface to deviate from the preset position.

[0003] For example, the Chinese invention patent with patent number CN201220526391 discloses "An Electric Curve Saw", which includes a base plate, a casing, and a motor, an eccentric wheel and a reciprocating rod arranged in the casing. The eccentric wheel is connected to the drive shaft of the motor, and the lower end of the reciprocating rod is connected to a saw blade. The above-mentioned saw blade is a slender and thin blade, so the above-mentioned problem will occur during use.

[0004] Another example is the Chinese invention patent CN2477333Y, which discloses a "curve saw blade" made of round metal wire, with saw teeth distributed in the middle of the round metal wire and no saw teeth at both ends of the round metal wire. Although this type of saw blade has changed the traditional thin and light blade form and achieved the turning of the blade to a certain extent, the round metal wire itself is relatively small, and the strength of the saw teeth connected to it is obviously not guaranteed. If the saw teeth are too short, the cutting effect will be affected, and if the saw teeth are too long, the turning flexibility will be affected. Therefore, in the actual cutting process, it is often difficult to take into account both the cutting effect and the turning flexibility; in addition, the saw teeth arranged along the circumference of the round metal wire will cause wood chips to block during the cutting process, affecting the cutting effect.

[0005] Therefore, further improvement is needed for the same type of wire saws. Summary of the invention

[0006] The first technical problem to be solved by the present invention is to provide a wire saw cutting knife with good cutting effect and flexible steering in view of the current status of the above-mentioned prior art.

[0007] The second technical problem to be solved by the present invention is to provide a wire saw cutting knife which is easy to remove chips and will not cause blockage by wood chips.

[0008] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a wire saw cutting knife, including a arbor and a handle, the arbor is connected to the handle, and at least two cutting blades are arranged on the arbor, at least two of the cutting blades are spirally coiled from the first end to the second end of the outer peripheral wall of the arbor and are arranged at intervals, each of the cutting blades is arranged with a plurality of teeth at intervals, and the projections of the plurality of teeth on a plane perpendicular to the arbor are connected in sequence along the circumference of the arbor.

[0009] In order to ensure uniform cutting in all directions, the projections of two adjacent teeth on each cutting edge on a plane perpendicular to the blade bar overlap. The overlapping of the teeth can ensure that there are more than one tooth in each direction to cut the material within an effective stroke, ensuring the cutting quality, and preventing the continued cutting after partial or a few teeth are worn, thus extending the service life.

[0010] Furthermore, the overlap of the projections of two adjacent teeth on each cutting edge on a plane perpendicular to the shank is 10% to 20%. Excessive overlap will result in too many teeth in a single direction, and each tooth cannot be used most effectively, which will affect the cutting efficiency. Therefore, it is preferred that the overlap is 10% to 20%, so as to ensure the cutting quality and improve the cutting effect.

[0011] In the design of the wire saw, the parameters of the inner diameter and tooth thickness of the matching tool are taken into consideration. Preferably, the overlap of the projections of two adjacent teeth on each cutting edge on a plane perpendicular to the arbor is 15%, thereby ensuring that there is more than one tooth to cut the material in each direction within an effective cutting stroke.

[0012] When cutting wood, the saw blade has a higher cutting efficiency when the TPI is maintained at 6 to 8. Due to size limitations, preferably, the front angle α of the blade teeth is 30 to 40 degrees, and the back angle β of the blade teeth is 30 degrees. In this way, in multiple strokes of a single cutting by the cutting knife, each stroke has 6 teeth, that is, the TPI is 6. The selection of the front angle and back angle can further ensure the cutting quality and improve the cutting efficiency.

[0013] The designed height and thickness of the teeth can vary according to the designed tool size and the strength of the cutting material. Preferably, the tooth height H of the teeth is 2 to 4 mm, and the tooth thickness L of the teeth is 1 to 2 mm. Such a design of tooth height and tooth thickness ensures that the teeth can cover the entire circumferential cutting surface in a single stroke, enhances the strength of the teeth, and can effectively reduce the volume and mass of the tool.

[0014] Specifically, the tooth height H of the cutter teeth is 3 mm, and the tooth thickness L of the cutter teeth is 1.5 mm. The tooth height H is based on the ratio of the inner and outer diameters of the cutter to the length of the cutter, so that the cutter length has two full-tooth cutting strokes, and the tooth thickness of 1.5 mm can ensure that in each stroke, there are 2 teeth in each 45° direction to cut the material.

[0015] The technical solution adopted by the present invention to solve the second technical problem is: a chip discharge groove for discharging wood chips is formed between two adjacent cutting edges, so that after cutting, the wood chips can be discharged smoothly without causing blockage.

[0016] Compared with the prior art, the advantages of the present invention are: the wire saw cutting knife includes a knife bar and a knife handle, the knife bar is connected to the knife handle, at least two cutting blades are arranged on the knife bar, at least two of the cutting blades are spirally coiled from the first end to the second end of the outer peripheral wall of the knife bar and are arranged at intervals, and multiple teeth are arranged at intervals on each cutting blade, and the projections of the multiple teeth on the plane perpendicular to the knife bar are connected in sequence along the circumference of the knife bar, so that the arrangement of the cutting blade can ensure that the cutting knife cuts more smoothly within a cutting stroke; the design that multiple projections of the teeth on the plane perpendicular to the knife bar are connected in sequence along the circumference of the knife bar can ensure that no matter which angle the cutting knife is changed to for cutting, there will be corresponding knife teeth and cutting materials in contact within the same cutting stroke, while taking into account the flexible steering and ensuring the cutting effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of a cutting knife according to an embodiment of the present invention;

[0018] Figure 2 for Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0019] Figure 3 for Figure 1 A schematic diagram of the enlarged structure at B in the middle;

[0020] Figure 4 for Figure 1 Schematic diagram of the overall structure from another angle. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below with reference to the accompanying drawings.

[0022] like Figures 1 to 4 As shown, it is a preferred embodiment of the present invention. In this embodiment, the wire saw cutting knife includes a shank 1 and a handle 2, wherein the shank 1 is connected to the handle 2. The shank 1 and the handle 2 can be connected by a connecting piece such as a screw, or can be welded or integrally cast.

[0023] The knife bar 1 is provided with at least two cutting edges 11, and a chip discharge groove 1a for discharging wood chips is formed between two adjacent cutting edges 11, so that wood chips generated during the cutting process will be discharged along the chip discharge groove 1a with the action of the cutting knife, and will not cause blockage.

[0024] There are two cutting blades 11 in the present embodiment, but there can be more than one. The two cutting blades 11 are spirally coiled from the first end to the second end of the outer peripheral wall of the shank 1 and are arranged at intervals. A plurality of blade teeth 12 are arranged at intervals on each cutting blade 11, and the projections of the plurality of blade teeth 12 on a plane perpendicular to the shank 1 are connected in sequence along the circumference of the shank 1, that is, within a cutting stroke of the cutting blade 11, the distribution of the above-mentioned blade teeth 12 should cover the entire circumference of the shank 1, so that when cutting, each time a direction is changed, there will be a corresponding blade tooth 11 on the shank 1 for cutting, ensuring that the entire cutting knife can be flexibly switched in different directions.

[0025] On each of the above-mentioned cutting edges 11, the projections of two adjacent teeth 12 on the plane perpendicular to the shank 1 partially overlap. Specifically, in this embodiment, the overlap of the projections of two adjacent teeth 12 on the plane perpendicular to the shank 1 is 10% to 20%. Specifically, the overlap of the projections of two adjacent teeth 12 on the plane perpendicular to the shank 1 is 15%.

[0026] When cutting wood, the saw blade has a higher cutting efficiency when maintaining TPI at 6 to 8. Due to size limitations, in this embodiment, the front angle α of the tooth is 30 to 40 degrees, and the back angle β of the tooth is 30 degrees. In this way, in multiple strokes of a single cutting by the cutting knife, each stroke has 6 teeth, that is, the TPI is 6. Such selection of the front angle and back angle can further ensure the cutting quality and improve the cutting efficiency. In addition, the tooth height H of the tooth 12 is 2 to 4 mm, and the tooth thickness L of the tooth 12 is 1 to 2 mm. Specifically, the tooth height H of the tooth 12 is 3 mm, and the tooth thickness L of the tooth 12 is 1.5 mm.

Claims

1. A wire saw cutting knife, characterized in that: The invention comprises a knife bar (1) and a knife handle (2), wherein the knife bar (1) is connected to the knife handle (2), and at least two cutting edges (11) are arranged on the knife bar (1), and at least two of the cutting edges (11) are spirally wound from a first end to a second end of an outer peripheral wall of the knife bar (1) and are arranged at intervals, and each of the cutting edges (11) is provided with a plurality of teeth (12) at intervals, and the projections of the plurality of teeth (12) on a plane perpendicular to the knife bar (1) are connected in sequence along the circumference of the knife bar (1).

2. The wire saw cutting blade according to claim 1, characterized in that: The projections of two adjacent teeth (12) on each cutting edge (11) on a plane perpendicular to the knife rod (1) partially overlap.

3. The wire saw cutting blade according to claim 2, characterized in that: The overlap degree of projections of two adjacent teeth (12) on each cutting edge (11) on a plane perpendicular to the knife rod (1) is 10% to 20%.

4. The wire saw cutting blade according to claim 3, characterized in that: The overlap degree of projections of two adjacent teeth (12) on each cutting edge (11) on a plane perpendicular to the knife rod (1) is 15%.

5. The wire saw cutting blade according to claim 1, characterized in that: The front angle α of the blade tooth (12) is 30 to 40 degrees, and the rear angle β of the blade tooth (12) is 30 degrees.

6. The wire saw cutting blade according to any one of claims 1 to 5, characterized in that: The tooth height H of the blade teeth (12) is 2 to 4 mm, and the tooth thickness L of the blade teeth (12) is 1 to 2 mm.

7. The wire saw cutting blade according to claim 6, characterized in that: The tooth height H of the blade teeth (12) is 3 mm, and the tooth thickness L of the blade teeth (12) is 1.5 mm.

8. The wire saw cutting blade according to any one of claims 1 to 5, characterized in that: A chip discharge groove (1a) for discharging wood chips is formed between two adjacent cutting edges (11).

Images